Pressing method and device for pasting steel plate
By using the compression method of the backpressure steel plate and the backpressure screw, the problem of the steel plate being closely adhered to the concrete surface when the longitudinal anchor bolts are large, and more efficient, safe and reliable steel plate reinforcement construction is achieved.
Patent Information
- Application Number
- CN202411348357.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-02-07
AI Technical Summary
During the reinforcement process of adhesion steel plates, due to the large spacing of longitudinal anchor bolts, it is difficult for the steel plate to be closely adhered to the concrete surface, affecting the overall stress performance.
The compression method of the backpressure steel plate and the backpressure screw is adopted. By measuring the anchor bolt spacing, the reverse pressure steel plate of the appropriate length is selected, and the backpressure screw is installed along the longitudinal direction to tighten the steel plate to ensure that the steel plate and the concrete surface are in close contact.
It effectively avoids the problems of poor length adaptability, difficulty in transportation and large space occupied by traditional square wood support. It is suitable for different reinforcement environments, including the base surface with inclined angles, and improves construction efficiency, safety and reliability.
Smart Images
Figure CN119392960A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of reinforcement construction, and in particular to a pressing method and device for pasting steel plates. Background Art
[0002] Bonding steel plates is a common measure to deal with longitudinal, transverse and oblique cracks in concrete structures. By bonding steel plates to the surface of concrete and fixing them with anchor bolts, the steel plates and concrete components are subjected to joint forces, effectively improving the bending, shear and compression resistance of the components. This technology is commonly used to reinforce hollow slab beam bridges, composite box beam bridges, equal-section and variable-section beam bridges or building concrete structures.
[0003] During the reinforcement process, steel plates are usually pasted along the entire longitudinal length of the bridge. The steel plates are relatively long. In order to reduce damage to the beam body, the spacing between the punched anchors is 50~100cm, and the longest spacing is even up to 150cm. Therefore, the steel plates between the longitudinal anchor bolts sag due to their own weight, making it difficult to ensure effective and dense adhesion with the concrete surface, ultimately affecting the overall stress performance.
[0004] To solve this problem, a common practice on construction sites is to use square timber or other materials as temporary support structures, with one end of the support structure standing on the construction scaffolding or the ground, and the other end fixed in the middle of the steel plate between two anchor bolts, and removed after the adhesive is completely cured. The disadvantages of this approach are that the site environment is complex, the applicability of the length of the square timber support is poor, and the volume is large and difficult to transport; the length of the pasted steel plate is long, and the number of square timber temporary supports used is large, and it occupies a lot of space, which affects the rest of the construction process and the movement of personnel and materials, and there are safety hazards; this type of temporary support is only for the reinforcement of the bottom surface of the concrete structure, and does not consider the reinforcement of the base surface with an inclined angle.
[0005] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Summary of the invention
[0006] The present invention provides a pressing method and device for pasting steel plates, thereby effectively solving the problems in the background technology.
[0007] In order to achieve the above object, the technical solution adopted by the present invention is: a pressing method for pasting steel plates, comprising the following steps: Measure the spacing between the anchor bolts for fixing the adhesive steel plate, and select a counter-pressure steel plate of appropriate length, on which a counter-pressure nut is preset; Install the counter-pressure steel plates on the fixed anchor bolts in sequence along the adhesive steel plates; Screw the back-pressure screw into the back-pressure nut in sequence along the longitudinal direction, and tighten the back-pressure screw to press the bonded steel plate; Keep the steel plate pressed tightly without interference and wait for the colloid of the steel plate to solidify; Remove the back-pressure screw and back-pressure steel plate, and apply protective coating to the bonded steel plate.
[0008] Furthermore, the step of sequentially installing the counter-pressure steel plates on the fixing anchor bolts along the adhesive steel plates includes: Along the longitudinal direction of the bonding steel plate, the two ends of the counter-pressure steel plate are sequentially sleeved on the anchor rods of the fixing anchor bolts of the bonding steel plate; The counter-pressure steel plate is fixed to the fixing anchor bolts of the adhesive steel plate by fixing nuts.
[0009] Furthermore, the method of sequentially sleeve the two ends of the counter-pressure steel plate onto the anchor rods of the fixing anchor bolts of the adhesive steel plate also includes: When installing the counter-pressure steel plates, except for the counter-pressure steel plates at the head and tail, the counter-pressure steel plates in the middle section are overlapped at the fixed position, and the cross-section of the installation position of the counter-pressure steel plates is alternately distributed in a positive T shape or an inverted T shape.
[0010] Furthermore, after the counter-pressure steel plates are sequentially installed on the fixing anchor bolts along the adhesive steel plates, the method further includes: A back-pressure gasket is installed in the gap between the back-pressure steel plate and the bonding steel plate. The back-pressure gasket is located at the position where the bonding steel plate needs to be pressed. When the back-pressure screw is tightened, it contacts the back-pressure gasket.
[0011] Furthermore, the counter-pressure gasket is also provided with a flexible surface, and the flexible surface is located on the side in contact with the adhesive steel plate.
[0012] Furthermore, when the back-pressure screw is tightened, the position in contact with the back-pressure gasket is located at the center or near the center of the back-pressure gasket.
[0013] Furthermore, when removing the back-pressure screw rod and the back-pressure steel plate, they are removed in the reverse order of installation.
[0014] Furthermore, after removing the counter-pressure screw rod and the counter-pressure steel plate, the method further includes: cutting off the excess length of the anchor rod of the adhesive steel plate fixing anchor bolt.
[0015] Furthermore, the shape of the counter-pressure gasket includes: rectangle, circle, trapezoid or polygon with more than four sides.
[0016] The present invention also includes a pressing device for pasting steel plates, using the above method, including: A counter-pressure steel plate, wherein the counter-pressure steel plate is fixedly arranged between two fixing anchor bolts of the adhesive steel plate; A counter-pressure nut, wherein the counter-pressure nut is arranged on the counter-pressure steel plate; A counter-pressure screw rod cooperates with the counter-pressure nut and is arranged longitudinally. When the counter-pressure screw rod is tightened, the bonded steel plate is pressed.
[0017] The beneficial effects of the present invention are as follows: the present invention can effectively avoid the problems of traditional square wood supports in terms of poor length adaptability, transportation difficulties, and large space occupation. At the same time, the length and angle of the counter-pressure steel plate and the counter-pressure screw can be adjusted as needed, and are suitable for different reinforcement environments, including base surfaces with inclined angles. At the same time, the fixed anchor bolts of the adhesive steel plate are used in situ as a device for transmitting the reaction force, without the need to drill holes in the concrete structure, thus avoiding damage to the original structure. This technical solution not only improves the construction efficiency, but also enhances the safety and reliability of the construction process. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 is a flow chart of the method of the present invention; Figure 2 It is a structural schematic diagram of the device of the present invention; Figure 3 This is a structural diagram of the installation of the counter-pressure steel plate.
[0020] Figure numerals: 1, back-pressure steel plate; 11, back-pressure nut; 12, back-pressure screw; 2, back-pressure gasket. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0022] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside”, etc., are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0024] like Figure 1 As shown: A pressing method for pasting steel plates, comprising the following steps: Measure the spacing between the anchor bolts for fixing the bonding steel plate, and select a counter-pressure steel plate 1 of appropriate length, on which a counter-pressure nut 11 is preset; Install the counter-pressure steel plate 1 on the fixing anchor bolts in sequence along the adhesive steel plate; The back-pressure screw 12 is screwed into the back-pressure nut 11 in sequence along the longitudinal direction, and the back-pressure screw 12 is tightened to press the bonded steel plate; Keep the steel plate pressed tightly without interference and wait for the colloid of the steel plate to solidify; The back-pressure screw 12 and the back-pressure steel plate 1 are removed, and the bonded steel plate is subjected to protective coating treatment.
[0025] This method can effectively avoid the problems of traditional square wood supports in terms of poor length adaptability, transportation difficulties, and large space occupation. At the same time, the length and angle of the counter-pressure steel plate 1 and the counter-pressure screw 12 can be adjusted as needed, and are suitable for different reinforcement environments, including base surfaces with inclined angles. This technical solution not only improves construction efficiency, but also enhances the safety and reliability of the construction process.
[0026] like Figures 2 to 3 As shown, in this embodiment, the counter-pressure steel plate 1 is sequentially installed on the fixing anchor bolt along the adhesive steel plate, including: Along the longitudinal direction of the bonding steel plate, the two ends of the counter-pressure steel plate 1 are sequentially sleeved on the anchor rods of the fixing anchor bolts of the bonding steel plate; The counter-pressure steel plate 1 is fixed to the fixing anchor bolts of the adhesive steel plate by fixing nuts.
[0027] Along the longitudinal direction of the pasted steel plate, the two ends of the counter-pressure steel plate 1 are sleeved on the anchor rods of the fixing anchor bolts of the pasted steel plate. The counter-pressure steel plate 1 is fixed to the fixing anchor bolts of the pasted steel plate by fixing nuts. The fixing anchor bolts of the pasted steel plate are used as a device for transmitting reaction force. There is no need to punch holes in the concrete structure. The non-destructive installation avoids damage to the original structure. Different tightening forces are applied to the counter-pressure screw 12 to achieve different degrees of compression effects on the pasted steel plate. It can better ensure that the pasted steel plate is tightly adhered to the concrete base surface, and has a positive contribution to the joint force of the pasted steel plate and the concrete structure. The device is small in size, simple to operate with quick disassembly and assembly, and easy to carry. It ensures the compression effect of the pasted steel plate without occupying the construction site, does not affect the space around the concrete, and avoids construction safety hazards.
[0028] The two ends of the counter-pressure steel plate 1 are sequentially sleeved on the anchor rods of the fixing anchor bolts of the adhesive steel plate, and further include: When the counter-pressure steel plates 1 are installed, except for the counter-pressure steel plates 1 at the head and tail, the counter-pressure steel plates 1 in the middle section are overlapped at the fixed position, and the cross-section of the installation position of the counter-pressure steel plates 1 is alternately distributed in a positive T shape or an inverted T shape.
[0029] The counter-pressure steel plates 1 in the middle section are overlapped at the fixed position, which can increase the connection strength and force uniformity between the steel plates. The cross-section of the installation position of the counter-pressure steel plates 1 is alternately distributed in a positive or negative shape: positive shape: that is, when the three anchor bolts are arranged in a positive shape, the counter-pressure steel plate 1 spans two of the anchor bolts, and the next counter-pressure steel plate 1 spans the second and third anchor bolts. Inverted shape: that is, when the three anchor bolts are arranged in an negative shape, the counter-pressure steel plate 1 spans two of the anchor bolts, and the next counter-pressure steel plate 1 spans the second and third anchor bolts. This alternating distribution design can further improve the stability and bonding effect of the counter-pressure steel plate 1, thereby improving the bearing capacity and durability of the overall structure.
[0030] In this embodiment, after the counter-pressure steel plate 1 is sequentially installed on the fixing anchor bolt along the adhesive steel plate, the method further includes: A back-pressure gasket 2 is installed in the gap between the back-pressure steel plate 1 and the bonding steel plate. The back-pressure gasket 2 is located at the position where the bonding steel plate needs to be compressed. When the back-pressure screw 12 is tightened, it contacts the back-pressure gasket 2.
[0031] The back pressure gasket 2 should be located at the position where the steel plates need to be pressed to ensure that the screw is in contact with the back pressure gasket 2 when it is tightened. The use of the back pressure gasket 2 can better fill the gap between the steel plates, ensure the uniform transmission of the pressing force, improve the bonding effect of the steel plates, and thus enhance the bearing capacity and durability of the overall structure.
[0032] As a preferred embodiment of the above embodiment, the back pressure gasket 2 is further provided with a flexible surface, and the flexible surface is located on the side in contact with the adhesive steel plate.
[0033] The flexible surface can be set as rubber, and the flexible surface is fixed on the back pressure gasket 2 by prefabrication in advance, and can be fixed by bonding or other methods. By setting the flexible surface on the back pressure gasket 2, the construction quality of the pasted steel plate can be further improved, ensuring its long-term stability and reliability in use. The use of flexible materials such as rubber can provide a better fitting effect during the pressing process and reduce the hidden dangers caused by small gaps.
[0034] When the back-pressure screw 12 is tightened, the position in contact with the back-pressure gasket 2 is located at the center of the back-pressure gasket 2 or near the center.
[0035] The flexible surface and central force point design of the counter-pressure gasket 2 can better fill the tiny gap between the steel plate and the concrete, ensure the uniform distribution of the pressing force, improve the bonding effect of the bonded steel plate, and thus enhance the bearing capacity and durability of the overall structure.
[0036] In this embodiment, when removing the back-pressure screw rod 12 and the back-pressure steel plate 1, they are removed in the reverse order of installation.
[0037] By dismantling in the reverse order of installation, unnecessary disturbance and damage to the cured bonded steel plates and concrete structures can be avoided, ensuring construction safety and structural integrity.
[0038] As a preferred embodiment of the above, after removing the counter-pressure screw rod 12 and the counter-pressure steel plate 1, it also includes: cutting off the excess length of the anchor rod of the adhesive steel plate fixing anchor bolt.
[0039] After removing the counter-pressure screw 12 and the counter-pressure steel plate 1, cut off the excess length of the anchor rod of the bonding steel plate fixing anchor bolt so that it is flush with the surface of the bonding steel plate or retains a certain length appropriately, which not only improves the aesthetics of the structure but also reduces the corrosion risk of the exposed part of the anchor rod.
[0040] The shape of the back pressure gasket 2 includes: rectangle, circle, trapezoid or polygon with more than four sides.
[0041] like Figure 2 As shown, this embodiment also includes a pressing device for pasting steel plates, using the above method, including: A counter-pressure steel plate 1, which is fixedly arranged between two fixing anchor bolts of the adhesive steel plate; A counter-pressure nut 11, which is arranged on the counter-pressure steel plate 1; The back-pressure screw 12 cooperates with the back-pressure nut 11 and is arranged longitudinally. When the back-pressure screw 12 is tightened, the pasted steel plate is pressed.
[0042] By fixing the nut, the counter-pressure steel plate 1 is fixed to the fixing anchor bolt of the pasting steel plate. The fixing anchor bolt of the pasting steel plate is used as a device for transmitting the reaction force. There is no need to drill holes in the concrete structure. The non-destructive installation avoids damage to the original structure. Different tightening forces are applied to the counter-pressure screw 12 to achieve different degrees of compression effect on the pasting steel plate, which can better ensure that the pasting steel plate is tightly adhered to the concrete base surface and has a positive contribution to the joint force of the pasting steel plate and the concrete structure. The device is small in size, easy to disassemble and install, and easy to carry. It ensures the compression effect of the pasting steel plate without occupying the construction site, does not affect the space around the concrete, and avoids construction safety hazards.
[0043] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. A pressing method for pasting steel plates, characterized in that: The steps include: Measure the spacing between the anchor bolts for fixing the adhesive steel plate, and select a counter-pressure steel plate of appropriate length, on which a counter-pressure nut is preset; Install the counter-pressure steel plates on the fixed anchor bolts in sequence along the adhesive steel plates; Screw the back-pressure screw into the back-pressure nut in sequence along the longitudinal direction, and tighten the back-pressure screw to press the bonded steel plate; Keep the steel plate pressed tightly without interference and wait for the colloid of the steel plate to solidify; Remove the back-pressure screw and back-pressure steel plate, and apply protective coating to the bonded steel plate.
2. The pressing method for bonding steel plates according to claim 1, characterized in that: The method of sequentially installing the counter-pressure steel plates on the fixing anchor bolts along the adhesive steel plates includes: Along the longitudinal direction of the bonding steel plate, the two ends of the counter-pressure steel plate are sequentially sleeved on the anchor rods of the fixing anchor bolts of the bonding steel plate; The counter-pressure steel plate is fixed to the fixing anchor bolts of the adhesive steel plate by fixing nuts.
3. The pressing method for bonding steel plates according to claim 2, characterized in that: The method of sequentially sleeve the two ends of the counter-pressure steel plate on the anchor rods of the fixing anchor bolts of the adhesive steel plate also includes: When installing the counter-pressure steel plates, except for the counter-pressure steel plates at the head and tail, the counter-pressure steel plates in the middle section are overlapped at the fixed position, and the cross-section of the installation position of the counter-pressure steel plates is alternately distributed in a positive T shape or an inverted T shape.
4. The pressing method for bonding steel plates according to claim 1, characterized in that: After the counter-pressure steel plates are sequentially installed on the fixing anchor bolts along the adhesive steel plates, the method further includes: A back-pressure gasket is installed in the gap between the back-pressure steel plate and the bonding steel plate. The back-pressure gasket is located at the position where the bonding steel plate needs to be pressed. When the back-pressure screw is tightened, it contacts the back-pressure gasket.
5. The pressing method for bonding steel plates according to claim 4, characterized in that: The counter-pressure gasket is also provided with a flexible surface, and the flexible surface is located on the side in contact with the adhesive steel plate.
6. The pressing method for bonding steel plates according to claim 4, characterized in that: When the back-pressure screw is tightened, the position in contact with the back-pressure gasket is located at the center or near the center of the back-pressure gasket.
7. The pressing method for bonding steel plates according to claim 1, characterized in that: When removing the back-pressure screw rod and the back-pressure steel plate, they are removed in the reverse order of installation.
8. The pressing method for bonding steel plates according to claim 1, characterized in that: After removing the counter-pressure screw rod and the counter-pressure steel plate, the method further includes: cutting off the anchor rod of the adhesive steel plate fixing anchor bolt with excess length.
9. The pressing method for bonding steel plates according to claim 4, characterized in that: The shape of the counter-pressure gasket includes: rectangle, circle, trapezoid or polygon with more than four sides.
10. A pressing device for bonding steel plates, characterized in that: Use of the method according to any one of claims 1 to 9, comprising: A counter-pressure steel plate, wherein the counter-pressure steel plate is fixedly arranged between two fixing anchor bolts of the adhesive steel plate; A counter-pressure nut, wherein the counter-pressure nut is arranged on the counter-pressure steel plate; A counter-pressure screw rod cooperates with the counter-pressure nut and is arranged longitudinally. When the counter-pressure screw rod is tightened, the bonded steel plate is pressed.